Absence of a polar phase in perovskite chromite RCrO3 (R=La and Pr)

Kenji Yoshii; Naoshi Ikeda; Yutaka Shimojo; Yoshinobu Ishii

doi:10.1016/j.matchemphys.2016.12.074

Absence of a polar phase in perovskite chromite RCrO₃ (R=La and Pr)

Kenji Yoshii, Naoshi Ikeda, Yutaka Shimojo, Yoshinobu Ishii

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

Magnetic and dielectric properties have been studied for LaCrO₃, PrCrO₃, and their solid solution La_0.5Pr_0.5CrO₃, which belong to a family of the ferroelectric orthochromite series RCrO₃ (R: rare earths). The magnetic measurements confirm that the materials show canted antiferromagnetic ordering at 240–288 K. Neutron diffraction patterns could be fitted with the centrosymmetric Pnma, which is different from the non-centrosymmetric structure proposed for the ferroelectric phase of NdCrO₃. The large dielectric constants are likely due to the hopping of charge carriers as proposed previously for other chromites.

Original language	English
Pages (from-to)	96-101
Number of pages	6
Journal	Materials Chemistry and Physics
Volume	190
DOIs	https://doi.org/10.1016/j.matchemphys.2016.12.074
Publication status	Published - Apr 1 2017

Keywords

Chromite
Ferroelectricity
Magnetism
Perovskite

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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10.1016/j.matchemphys.2016.12.074

Cite this

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title = "Absence of a polar phase in perovskite chromite RCrO3 (R=La and Pr)",

abstract = "Magnetic and dielectric properties have been studied for LaCrO3, PrCrO3, and their solid solution La0.5Pr0.5CrO3, which belong to a family of the ferroelectric orthochromite series RCrO3 (R: rare earths). The magnetic measurements confirm that the materials show canted antiferromagnetic ordering at 240–288 K. Neutron diffraction patterns could be fitted with the centrosymmetric Pnma, which is different from the non-centrosymmetric structure proposed for the ferroelectric phase of NdCrO3. The large dielectric constants are likely due to the hopping of charge carriers as proposed previously for other chromites.",

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AU - Yoshii, Kenji

AU - Ikeda, Naoshi

AU - Shimojo, Yutaka

AU - Ishii, Yoshinobu

PY - 2017/4/1

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AB - Magnetic and dielectric properties have been studied for LaCrO3, PrCrO3, and their solid solution La0.5Pr0.5CrO3, which belong to a family of the ferroelectric orthochromite series RCrO3 (R: rare earths). The magnetic measurements confirm that the materials show canted antiferromagnetic ordering at 240–288 K. Neutron diffraction patterns could be fitted with the centrosymmetric Pnma, which is different from the non-centrosymmetric structure proposed for the ferroelectric phase of NdCrO3. The large dielectric constants are likely due to the hopping of charge carriers as proposed previously for other chromites.

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KW - Ferroelectricity

KW - Magnetism

KW - Perovskite

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